- Agree not to share study medication with another person and to return all unused study drug to the investigator † A female subject or a female partner of a male subject is considered to have childbearing potential unless she meets at least one of the following criteria: Age ≥50 years and naturally amenorrhoeic for ≥ 1 year (amenorrhoea following cancer therapy does not rule out childbearing potential), premature ovarian failure confirmed by a specialist gynaecologist, previous bilateral salpingo-oophorectomy or hysterectomy, XY genotype, Turner's syndrome or uterine agenesis.